//字典转链接（参数）

- (NSString *)keyValueStringWithDict:(NSDictionary *)dict

{

    if (dict == nil) {

        return nil;

    }

    NSMutableString *string = [NSMutableString stringWithString:@"?"];

    [dict enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {

        [string appendFormat:@"%@=%@&",key,obj];

    }];

    if ([string rangeOfString:@"&"].length) {

        [string deleteCharactersInRange:NSMakeRange(string.length - , )];

    }

    return string;

}

//链接转字典  （参数）

-(NSDictionary *)dictionaryWithUrlString:(NSString *)urlStr

{

    if (urlStr && urlStr.length && [urlStr rangeOfString:@"?"].length == ) {

        NSArray *array = [urlStr componentsSeparatedByString:@"?"];

        if (array && array.count == ) {

            NSString *paramsStr = array[];

            if (paramsStr.length) {

                NSMutableDictionary *paramsDict = [NSMutableDictionary dictionary];

                NSArray *paramArray = [paramsStr componentsSeparatedByString:@"&"];

                for (NSString *param in paramArray) {

                    if (param && param.length) {

                        NSArray *parArr = [param componentsSeparatedByString:@"="];

                        if (parArr.count == ) {

                            [paramsDict setObject:parArr[] forKey:parArr[]];

                        }

                    }

                }

                return paramsDict;

            }else{

                return nil;

            }

        }else{

            return nil;

        }

    }else{

        return nil;

    }

}

//特殊链接解析不了 。  'https://wwww.baidu.com/#/sdffff?name=sdfff&pass=dddff'
/**

 获取url的所有参数

 @param url 需要提取参数的url

 @return NSDictionary

 */

-(NSDictionary *) parameterWithURL:(NSURL *) url {

    NSMutableDictionary *parm = [[NSMutableDictionary alloc]init];

    //传入url创建url组件类

    NSURLComponents *urlComponents = [[NSURLComponents alloc] initWithString:url.absoluteString];

    //回调遍历所有参数，添加入字典

    [urlComponents.queryItems enumerateObjectsUsingBlock:^(NSURLQueryItem * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {

        [parm setObject:obj.value forKey:obj.name];

    }];

    return parm;

}